I used a octaine boster awhile back. Now once warmed up the engine knocks terribly under modest acceleration. What can I do? Thanks!

 

Might check your base timing. SHould be 6 degrees BTDC

 

My guess is that's detonation. You 'd better stop before you do more damage. That is like hammering on the piston with a sledge hammer. Hopefully, you have not done any damage yet. Altering the chemistry of gasoline without knowing alot about your fuel needs is like playing with dynamite. Even many engine builders shy away from making decisions about altering the composition of gasoline. If octane is what you are trying to achieve, there are many racing fuels available. Union 76 or VP is your best source of fuel that is high octane and is blended for higher performance. Most octane boosters fail to achieve any significant improvement in octane levels. Probably the best out of them would be the one from NOS. However, even that brand fails to improve pump gas to the level that racing gas is rated at.

:nono:

If you are currently running pump gas and are still experiencing this problem with detonation, I would suggest that you check your O2 sensor. Octane boosters often damage these sensors. But perhaps, your engine has compensated for the improper mixture and the timing is off. IF you are not experienced with the procedure of resetting everything back within the normal parameters, you should consult a mechanic that can.


[Modified by Sharky Guam, 9:07 AM 6/4/2002]

 

:yesnod: :yesnod: :yesnod: :yesnod: :yesnod: :yesnod:

 

I would also pull all the plugs to see what they look like. You should be able to read them like a book.